Results 11 to 20 of about 1,064,420 (260)
Revista Colombiana de Estadística, 1983 Universidad Nacional de Colombia Universidad Nacional de Colombia
doaj +27 more sources
A Survey of Astronomical Research: An Astronomy for Development Baseline [PDF]
, 2013 Measuring scientific development is a difficult task. Different metrics have been put forward to evaluate scientific development; in this paper we explore a metric that uses the number of peer-reviewed, and when available non-peer-reviewed articles ...
V. Ribeiro +10 more
semanticscholar +1 more source
Primer congreso colombiano de estadística [PDF]
Revista Colombiana de Estadística, 1982 Universidad Nacional de Colombia Universidad Nacional de Colombia
doaj +2 more sources
Mammalogy Notes, 2020 La Colección de Mamíferos “Alberto Cadena García” del Instituto de Ciencias Naturales, Universidad Nacional de Colombia (ICN) ha aportado al conocimiento de los mamíferos en Colombia desde 1959.
H. F. López-Arévalo +2 more
semanticscholar +1 more source
Optimization of the diffraction efficiency in photorefractive crystals [PDF]
, 2017 The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are considered.
Arias Hernández, Néstor Alonso +3 more
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Electronic structure of the double perovskite Ba2Er(Nb,Sb)O 6 [PDF]
, 2014 In this work, we present a detailed study of the structural and the electronic structure of the double perovskite Ba2Er(Nb,Sb)O 6. All calculations were performed with the Full-Potential Linear Augmented Plane Wave method (FP-LAPW) based on the Density ...
Deluque Toro, Crispulo Enrique +3 more
core +3 more sources
Energy Management in PV Based Microgrids Designed for the Universidad Nacional de Colombia
Sustainability, 2020 Stand-alone Electrical microgrids (MGs) require power management strategies to extend the life-time of their devices and to guarantee the global power balance of non-critical loads such as lighting of small sections of an university campus or individual ...
L. Grisales-Noreña +4 more
semanticscholar +1 more source
Preyssler Heteropolyacids in the Self-Etherification of 5-Hydroxymethylfurfural to 5,5′-[Oxybis(methylene)]bis-2-furfural Under Mild Reaction Conditions [PDF]
, 2017 The synthesis of 5,5′-[oxybis(methylene)]bis-2-furfural (OBMF) from 5-hydroxymethylfurfural (5-HMF) was studied using bulk and alumina-supported Preyssler heteropolyacids (HPAs). The formation of OBMF was related to the amount of Brønsted acid sites, and
Afonso, Carlos A. M. +6 more
core +1 more source
Coherent exciton-vibrational dynamics and energy transfer in conjugated organics [PDF]
, 2018 Coherence, signifying concurrent electron-vibrational dynamics in complex natural and man-made systems, is currently a subject of intense study. Understanding this phenomenon is important when designing carrier transport in optoelectronic materials. Here,
Alfonso Hernandez, Laura +9 more
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Hospital Universitario Nacional de Colombia's expansion
Revista de la Facultad de Medicina, 2022 The processes required to implement the phases of the of the Institutional and Academic Expansion Plan of the Hospital Universitario Nacional de Colombia (HUN) were presented as a priority in the work proposal of the Dean’s Office of the Faculty of ...
José Ricardo Navarro-Vargas +2 more
semanticscholar +1 more source